Answer (Detailed Solution Below)

Option 1 : 20

Detailed Solution

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Given:

We need to solve the expression 

Formula used:

Basic arithmetic operations and algebraic identities.

Calculation:

  1. Calculate 122 and 82:

    122 = 144 and 82 = 64

  2. Subtract 82 from 122:

    122 - 82 = 144 - 64 = 80

  3. Multiply the result by 10:

    (122 - 82) × 10 = 80 × 10 = 800

  4. Calculate the denominator 20 × 2:

    20 × 2 = 40

  5. Divide the result from step 3 by the result from step 4:

    800/40 = 20

Therefore, the answer is 20.

Final Answer: 1) 20

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